Olivier Beretta won the Round 4 GT race on the streets as part of the Cadillac Grand Prix of St. Petersburg. Frank Montecalvo won in GTA, while Colin Thompson won in the GT Cup presented by MOMO class.

When the lights went out for the standing start, Beretta, in the No. 61 R. Ferri Motorsport Ferrari of Ontario/Toronto/Alberta Ferrari 458 GT3 Italia, who started third, rocketing to first through Turn 1, followed by the No. 25 of Nick Catsburg in the Blancpain Racing Lamborghini Gallardo GT3 FL2 who had started second. Following Beretta and Catsburg, pole sitter Andy Pilgrim in the No. 8 Cadillac Racing Cadillac ATS-VR GT3 went three wide with Ryan Dalziel in the No. 31 EFFORT Racing/World PMO Porsche 911 GT3R and Kevin Estre in the No. 9 K-PAX Racing McLaren 650S GT3.

Both Dalziel and Estre squeezed by Pilgrim through Turn 2. Later during lap 1, Mike Skeen in the No. 2 DeVilbiss/Hawk Performance Audi R8 LMS Ultra, who had started six, moved up passing Pilgrim. Coming across the stripe to complete lap 1 it was Beretta, Catsburg, Estre, Dalziel and Skeen for the top 5 in GT. On lap 2, Estre moved around Catsburg to take over second.

In GTA, Montecalvo, in the No. 66 Bayshore Racing DragonSpeed Mercedes-Benz AMG SLS GT3 who started 11th on the grid, and first in GTA, maintained his position over Michael Lewis, in the No. 41 EFFORT Racing/Curb-Agajanian Porsche 911 GT3R and Eric Lux, in the 08 Rembrandt Charms/Monticello Motor Mercedes-Benz AMG SLS GT3. Lewis who had started 17th behind Lux passed for second on the first lap.

A full-course yellow came out shortly as drivers were completing their first lap. The No. 80 ACS Manufacturing/Lone Star Racing Dodge Viper GT3R of Dan Knox spun through Turn 2, collecting the No. 54 of Tim Pappas. Pappas' No. 54 Black Swan Racing Mercedes-Benz AMG SLS GT3 was then contacted by a trio of GT Cup competitors -- the No. 18 Zoro/Truspeed Autosport Porsche 911 GT3 Cup of Phil Fogg Jr. the No. 97 Deep South/VersaCrane Landry Racing Porsche 911 GT3 Cup of Mitch Landry and the No. 13 Trefethen Family Vineyards ANSA Motorsports Porsche 911 GT3 Cup of Lorenzo Trefethen. Sloan Urry, who started sixth in the GT Cup class, assumed the lead when Fogg, Trefethen and Landry were collected in the incident. The incident was the MOMO Turning Point of the GT Cup Race.